Forces chaplains certainly included RC priests among their number, although you would only find them at the larger formations. In the 1960s one RC padre at Cranwell was a popular member of the officers' mess, great fun, and a leading light in the station flying club.
And the senior Royal Navy RC chaplain of a few years ago, now retired from the Service, is the very popular priest in our parish in Surrey. Get to Mass early if you want a seat!